Upgrade to 4.4.50-rt62

[kvmfornfv.git] / kernel / fs / cifs / cifsencrypt.c

diff --git a/kernel/fs/cifs/cifsencrypt.c b/kernel/fs/cifs/cifsencrypt.c
index e682b36..4acbc39 100644 (file)
--- a/kernel/fs/cifs/cifsencrypt.c
+++ b/kernel/fs/cifs/cifsencrypt.c
@@ -731,24 +731,26 @@ setup_ntlmv2_rsp(struct cifs_ses *ses, const struct nls_table *nls_cp)
 
        memcpy(ses->auth_key.response + baselen, tiblob, tilen);
 
+       mutex_lock(&ses->server->srv_mutex);
+
        rc = crypto_hmacmd5_alloc(ses->server);
        if (rc) {
                cifs_dbg(VFS, "could not crypto alloc hmacmd5 rc %d\n", rc);
-               goto setup_ntlmv2_rsp_ret;
+               goto unlock;
        }
 
        /* calculate ntlmv2_hash */
        rc = calc_ntlmv2_hash(ses, ntlmv2_hash, nls_cp);
        if (rc) {
                cifs_dbg(VFS, "could not get v2 hash rc %d\n", rc);
-               goto setup_ntlmv2_rsp_ret;
+               goto unlock;
        }
 
        /* calculate first part of the client response (CR1) */
        rc = CalcNTLMv2_response(ses, ntlmv2_hash);
        if (rc) {
                cifs_dbg(VFS, "Could not calculate CR1 rc: %d\n", rc);
-               goto setup_ntlmv2_rsp_ret;
+               goto unlock;
        }
 
        /* now calculate the session key for NTLMv2 */
@@ -757,13 +759,13 @@ setup_ntlmv2_rsp(struct cifs_ses *ses, const struct nls_table *nls_cp)
        if (rc) {
                cifs_dbg(VFS, "%s: Could not set NTLMV2 Hash as a key\n",
                         __func__);
-               goto setup_ntlmv2_rsp_ret;
+               goto unlock;
        }
 
        rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash);
        if (rc) {
                cifs_dbg(VFS, "%s: Could not init hmacmd5\n", __func__);
-               goto setup_ntlmv2_rsp_ret;
+               goto unlock;
        }
 
        rc = crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash,
@@ -771,7 +773,7 @@ setup_ntlmv2_rsp(struct cifs_ses *ses, const struct nls_table *nls_cp)
                CIFS_HMAC_MD5_HASH_SIZE);
        if (rc) {
                cifs_dbg(VFS, "%s: Could not update with response\n", __func__);
-               goto setup_ntlmv2_rsp_ret;
+               goto unlock;
        }
 
        rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash,
@@ -779,6 +781,8 @@ setup_ntlmv2_rsp(struct cifs_ses *ses, const struct nls_table *nls_cp)
        if (rc)
                cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
 
+unlock:
+       mutex_unlock(&ses->server->srv_mutex);
 setup_ntlmv2_rsp_ret:
        kfree(tiblob);